185540 divided by 91 
The aim is to understand the frequency of 91 in 185540.

Moving on to step 1:
91 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 91

On to step 2:
If we divide 18 by 91, we get 0 and a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Fetch the next digit (5) from the dividend, attach it to 18 and continue: 185 / 91

Advancing to step 3:
If we divide 185 by 91, we get 2 and a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 182 from 185 and we're left with 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 91

Moving on to step 4:
If we divide 35 by 91, we get 0 and a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we subtract 0 from 35, we get 35.
Take the next digit (4) from the dividend and append it to 35, then repeat: 354 / 91

Let's proceed to step 5:
91 goes into 354 3 times with a remainder of 81.
The number 3 becomes the next digit in our result. 
Result so far: 203.0
Deduct 273 from 354 and we're left with 81.
Take the next digit (0) from the dividend and append it to 81, then repeat: 810 / 91

Step 6:
The number 91 fits into 810 8 times, leaving a remainder of 82.
Write down 8 as next digit of the result. 
Result so far: 2038.0
The remainder is 82 after subtracting 728 from 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 7:
The number 91 fits into 820 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 2038.9
Subtracting 819 from 820 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 8:
10 divided by 91 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 2038.9
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
If we divide 100 by 91, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 2038.901
The remainder is 9 after subtracting 91 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 10:
When dividing 90 by 91, we get 0 with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 2038.901
Subtract 0 from 90 to get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 11:
When dividing 900 by 91, we get 9 with a remainder of 81.
Put 9 as the next digit of the answer. 
Result so far: 2038.90109
Deduct 819 from 900 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

On to step 12:
When dividing 810 by 91, we get 8 with a remainder of 82.
The number 8 becomes the next digit in our result. 
Result so far: 2038.901098
Subtract 728 from 810 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 13:
When dividing 820 by 91, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 2038.9010989
Subtracting 819 from 820 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 14:
10 divided by 91 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 2038.9010989
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 2038.9010989 and a remainder of 1e-08.